The airplane nosed over while landing on a 2450-by-55-feet turf runway. The 27,500-hour Airline Transport pilot later reported a normal touchdown and landing roll until the airplane rolled onto a graded area. At that point, the airplane bounced slightly, slowed, then flipped over. Subsequently, it was determined the pilot failed to notice the large white X on the approach end of the runway. The pilot further reported that was unable to access online Notam information and did not check any other sources.
